Why did christianity spread rapidly in the fourth century?

What is the purpose of the outer ear? a. to convert mechanical waves into electrical waves b. to evaluate the quality of sound c. to convert sound waves into mechanical waves d. to collect and focus sound waves

The first c.d. was released after the phonograph. 75 years 200 years 100 years 50 years

What are some of the qualities of mannerism that are reflected in bronzino’s work?